Metropolis of Kiev and all Rus'

The Metropolis of Kiev and all Rus' (Ukrainian: Митрополит Київський та всієї Русі, romanized: Mytropolyt Kyivskyi ta vsiiei Rusi) was a metropolis of the Eastern Orthodox Church that was erected on the territory of Kievan Rus'. It existed between 988 AD and 1590s AD. The long lasting "tug of war" between bishops from the Grand Duchy of Lithuania and bishops of the Principality of Moscow resulted in reorganization of the metropolis as the bishops from Moscow refused to recognize decisions of the Ecumenical Patriarch of Constantinople.

Source: Wikipedia — Metropolis of Kiev and all Rus' (CC BY-SA 4.0)